.popup {
    background:#fff;
    width: 400px;
    border: 1px solid #f2f2f2;
    position:fixed;
    left:50%;
    top:50%;
    margin:-100px 0 0 -200px;
    display: none;
}
.popup h1,
.popup p{
    font-size: 14px;
    padding: 15px 10px;
    color:#666;
}

.popup h1{
    letter-spacing:0.3px;
    color:#888;
    border-bottom:1px solid #d3d7db;
}

.popup p{
    background:none;
    font-size:14px;
    line-height:1.4;
    padding-top: 20px;
    padding-bottom: 20px;
}